One of the hardest parts is getting started.
Also hard is staying with it.
And if, or for many when, you "fall down," the very hardest part is getting re-started.
There are no hard and fast "rules" associated with the "No Flour No Sugar" diet. But The Key Concept is the foundation: No Flour and No Sugar.
So, how to get started? A variety of ways are possible, but three are obvious: Cold Turkey, Plan & Shop, and Baselines & Detox.